Light-colored asphaltic surface



May 5, 1925.

- J. H. YOUNG LIGHT COLORED ASPHALTIC SURFACE Original Filed March 27,1920 f/VI/E/VTOB. f

Patented-May 5,1925 7 UNITED STATES PATENT oFric-E,

.ramns HOWARD YOUNG, or PITTSBURGH, 'rnuusytvmm, 'nssreuon TO. H. H;

ROBERTSON C0,, OF PITTSBURGH, PENNSYLVANlZA,.ACORPORATlQON F PENN-SYLVANIA.

LIGHT-CQLORED Asrm irrc seamen Application filed. aha 27, 1920,SerialNo. 369,294; Renewed -0ctober 8., 1524.

To all whom it may ooncem:

Be it known that 1, JAMES HowAnn YoUNG, a citizen of the United Statesresiding in Pittsburgh, in the county of Allee gheny and State ofPennsylvania; have invented an Improvement in Light-Colored AsphalticSurfaces, of which the following description, in connection with theacco mpanying drawings, is a specification, like, v 110 characters onthe drawings representing like parts.

an asphaltic or likehyd-rocarbonaceous surface provided with a-coloredand particu- I 11% larly' a light:colored film orlayer affixed theretoand "free or substantially tree from discoloration -by thehydrocarbonaceous ma--' terial of said surface,

, Prior to this invention, at 'inpts have fill been made to provide.asphaltic ,or likehydrocarbonaceous surfaces with a. light colored filmor layer,-"by applying thereto an ordinary oil paint, but such attemptshave not to my knowledge been successful hydrocarbonaceous material,which vdiscolors the light colored 'paint and uh'reha an .the obiectsoughty 'lhe present invention has Tier. object to provide anarticlehavingan asp-haltic, .bituminous,-tar,'pitch or like hydrocarbo-q'naceous bla-ck' surface, with a light colored a layer or film,such as awhite, llrench gray,

light greener the like,-which is free or substantially tree fromdiscoloration by the.

' black of the underlying surtace, and which *also possesses certainproperties, as will be ac described, which render the light coloredsurface-layer or film particularly advan-"-' tageous-as a coating forasphaltic and like.

hydrocarbonaceous surlaces. 1 To this end, the light colored surfaceiilm or layer is. composed of cellulose-derivatives f as 'abase, "asolvent therefor, a pigment-or color, and a diluent or: thinner for thecellulose .solution, which diluent is of such a solvent surface, andwhich is present in suiiicient quantity to renderthe solvent for thecellulose derivatives'non-active or substantially so on the'asphalt orlike material without manature that it has very little it'anly ac Thisinvention relates to an article having terially aifecting the-solutionof the cellulose derivative used.

.It is preferred, to employ as the cellulose 7' derivatives cellulosenitrate of cellulose acetate, and as the solvent therefor acetone,

and acetates, such as amyl acetate, ethyl and and. the like may be.used. As a diluent which is non-active or substantially so upon theasphalt or like material, itis preferred to. use an alcohol, preferablyethyl or methyl alcohol.

'. ln'order that the invention may be clearlycomprehended, one set ofingredients and methyl acetates, ethyl and methyl ketones,

proportions with which excellent results have been obtained will .be'enumerated, but

'it isto be understood that it is not desired to "limit-the invention tothe particular ingredients and proportions recited.

Cellulose nitrate or i products containing" essentially cellulosenitrate, such as some photographic films,"celluloid, etc., is dissolvedin acetone in a manner Well known, and to this solution is then addedenough ethyl alcohol to produce a solution of the followingpro-portions,to wit: IOparts by Weightcellulose nitrate, 25 parts byweight acetone, 70 parts by weight ethyl alcohol, 5 parts by weightcastor oil.

\gjlo. this is thenadded ltltparts by weight of aluminum resinate andthe whole is stirred until-the resinate is dissolved. To this solutionis then added 10 parts by weight of powdered aluminum and 5 parts byweight of green pigmennfinely ground in alcohol; The whole is thenthoroughly stirred-together. By thinning this compo- ;s ition withamixture .ot-alcohol 70 parts and acetone 30 parts,it is possible to geta liquid. of a consistency which may be brushed onto the asphalticsurface eitherinecl'ianicallywor by hand, or it may be" sprayed onto thesurface or the asphaltic articlemay be dipped into it,-the idea bein tounit'ormlycoat the asphaltic surface wit 1 "the liquid. described. 1Upon standing the volatile part of the solution evaporates leaving atough uniform lilm over the asphaltic surface which is light green incolor and which has not/been darkened or streaked bythe constituents ofthe asphalt upon which the film. was produced,

. the film during the evaporation of the solpresents a hlghly attractiveappearance, be-' vents.

In theabove formula it will be seen that the alcohol which is anon-solvent for the asphalt, is present in the composition or paintmaterially in excess of the solvent for the cellulose base, so as torender the said solvent inactive or passive on the asphalt, yet is notin such excess as to precipitate the cellulose from its solution.

The film or layer above described, not only provides the black asphaltor like material with a light colored attractive surface, which is notstreaked or otherwise discolored by the black color of the asphalt, butalso forms when the solvent has evaporated a tough and durable weatherresisting surface which is not tacky and which prevents sticking.

Insteadof the light green pigment or color, any other pigment or colorsuitable for giving a light color, such as white, French gray or thelike can be used. Sp also any suitable pigment or color for giving adark color, such as red, brown, etc., may be used when a dark color isdesired and a clearer and better dark colored surface obtained.

The advantages of the invention are particularly noticeable when a lightcolored film or layer is desired.

When cellulose acetate isused in producing the film or layer, the sameprinciple of maintaining an adequate percentage of nonsolvent forasphalt in the solution of the cellulose acetate during the evaporationof the solvents to produce a satisfactory film on asphalt or the like isobserved.

The light colored film is especially adapted among other uses to beformed on asphaltic or like surfaces of metal articles and particularlymetal sheets.

Fig. 1 represents a plan view of a protected metal sheet provided with alight colored exterior surface layer or film, and

Fig. 2, a section of Fig. l on the line 2-2.

Referring to the drawing, (t represents a metal sheet provided with aprotective layer 6 of asphalt, bitumen or the like, and c representsthe, light colored film or layer affixed to the asphalt surface. A lightgreen film 0 is represented in the drawing. A metal sheet protected byasphalt and having a light green, white, French gray, or other lightcolored exterior surface, which is free or substantially free fromdiscoloration, is highly useful in the building arts, especially forroofs, sidings, shingles and the like and sides being durable,weather-resisting and capable of being shipped without sticking togetheror softening under summer temperatures. So also, the light colored filmis tough, firm and does not crack or alligator and serves as aprotective layer for the, as phalt, and can be painted with the ordinarydryingoil paint, as the latter is prevented from being discolored by theasphalt.

Inasmuch as the film or layer 0 may be applied to the asphalt surface inany suitable manner as above pointed out, it is particularly serviceableas a paint to be applied by hand to roofs or other articles orstructures of any material, which is covered with a layer of asphalt orthe like.

While it may and will be preferred to make the light colored compositionas a paint in which the non-solvent for the asphalt and the like ispresent in the paint, it is not desired to limit the present inventionin this respect, as it is possible to apply the non-solvent to theasphalt surface and then apply the cellulose colored solution to thearticle thus treated and obtain the light colored film or layer desired.

It is to be understood that the physical properties of the cellulosebase may be modified as desired by the addition to the cellulosesolution of other materials, such as triphenylphosphate, to reduce theinflam mability, and camphor, castor oil, etc. to increase theflexibility or otherwise modify the physical characteristics of thecellulose,

so long as they are not used in sufficient quantity to cause the film toappreciably dissolve the underlying asphalt or become discolored by it.

So also, resins, such as soft copals, sandarac, shellac or the resinatessuch as aluminium or zinc, may be added to the cellulose solution ifdesired.

In the foregoing specification, I disclose a form of building materialcomprising a base, an asphaltic or like hydrocarbonaceous surface on thebase, and a continuous insoluble layer comprising a metallic substancein the metallic state and formed as a part of said building materialwhich is impervious to asphaltic oils.

The particular use of a metallic substance in the metallic state as apart of the continuous layer is not, however, specifically claimed inthe present application, but is claimed in my 'co-pending application,Serial No. 523,359, filed December 19, 1921.

Claims. I

1. The combination with an article having an asphaltic orvlikehydrocarbonaceous surface, of a light-colored, flexible, thin layer orfilm afiixed directly to said asphaltic surface to contact therewith andhaving a base and a light-colored pigment whose color is substantiallyunaffected by said asphalticsurface.

2. The combination with an article having an asphaltic or likehydrocarbona'ceous surface, of a colored, flexible, thin layer or filmaflixed directly to said asphaltlc sur face to contact therewith andhaving a cellulose base and a colored pigment, whose color issubstantially unaffected by said provided with a coating of asphalt orlike asphaltic surface.

3. The combination with an article having an asphaltic or likehydrocarbonaceous Surface, of a light-colored, flexible, thin layer orfilm afiixed directl to said asphaltic surface to contact thereith andhaving a cellulose derivative as a ase and a light-colored pigmentcarried by said base and substantially unafi'ected in color bysaidasphaltic surface.

4; The combination with a metal article hydrocarbonaceous material, of alight-colcontact therewith and having a base and a light coloredpigmentcarried by said base and whose color is substantially unalfected,bysaid asphaltic coating.

' 5. The combination with an article having an asphaltic or likehydrocarbonaceous surface, of a flexible, thin film or layer of cellulose derivative affixed directly to said asphaltic surface to contacttherewith and form thereon a protective coating which is insoluble inwater, weather-resisting, firm, durable, non-tacky and substantiallyunaf fected by said asphaltic surface.

In testimony whereof I have signed my name to this specification.

JAMES HOWARD YOUNG.

